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| Fri 31 Oct 2025
Beijing, Nov. 1 -- Poly Changda Engineering has been granted a patent for Support-free Construction Hoop Structure for Cylindrical Single-column Pier. This invention was developed by Zhang Tianbo, Yan Chunming, Zhou Yukun, Peng Wei, Guo Xinyu, Qin Lang, Yang Youping, Zheng Ye, Wu Qi, Duan Shuhong and Cheng Yanping.
The patent a..